4-Bromo-5-nitro-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine
4-Bromo-3-nitro-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine
3-Bromo-5-nitro-6-(trifluoromethoxy)-2-(trifluoromethyl)pyridine
2-Bromo-6-nitro-3-(trifluoromethoxy)-5-(trifluoromethyl)pyridine